K. Hirose, Mitsuki Hirose, Shintaro Mita, Hisamatsu Nakano
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引用次数: 0
摘要
使用矩法对两个同心双环天线进行了分析，以提高 3 dB 轴向比带宽。每个天线都有一个与垂直于地平面的分支馈线相连的从动环路。首先，在从动环路外添加一个寄生环路，间距为 S。结果发现，当 S = 0.02 波长时，轴向比带宽的最大值为 23%。接着，我们将一个寄生环移至从动环内部。结果显示，天线的轴向比带宽为 40%，是单回路天线的三倍。分析结果得到了实验工作的验证。
A Fundamental Study on Circularly Polarized Double-Loop Antennas with Quasi-Two Sources
Two concentric double-loop antennas were analyzed using the moment method to increase the 3 dB axial ratio bandwidth. Each antenna has a driven loop connected to a branched feedline that is vertical to the ground plane. First, a parasitic loop was added outside of the driven one with a spacing of S. It was found that the axial ratio bandwidth has a maximum value of 23% for S = 0.02 wavelengths. Next, we moved a parasitic loop inside of the driven one. It was revealed that the antenna shows an axial ratio bandwidth of 40%, which is three times as wide as that of a single-loop antenna. The analysis results were verified with experimental work.
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